The Anesthesia Quality Institute has created the National Anesthesia Clinical Outcomes Registry to automatically capture electronic data specific to anesthesia cases. Data come from billing systems, quality management systems, hospital electronic health care records, and anesthesia information management systems. Aggregation of this data will allow for calculation of national and cohort-specific benchmarks for anesthesia outcomes of interest. Provision of this data to anesthesia practitioners through periodic private reports will motivate improvements in the quality of care.